Drum.



'PATENTED APR. 21, 1903.

J. HENNL.

DRUM.

APPLICATION FILED DBO. a. 1901.

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UNTT stares li ATENT @rrrcn,

JOHANN HENNL, OF SCHUNBACH, AUSTRIA-HUNGARY, ASSIGNOR TO THE FIRM QF A.OSMANEK, OF SCHidNBACH, AUSTRIA-HUNGARY.

DRUM.

snECIElSATZON forming part Letters Patent No. 725,842, dated April 21,1903.

Application filed December 3, 1901. Serial No. 84,570. (No model.)

To (ti/Z 1071/0711 it mty con/corn:

3e it known that l, JOHANN HENNL, a subject of the Emperor of rlustria-ilungary,residingat Schonbach, in the Province of Bohemia, in the Empireof Austria-Hungary, have invented certain new and useful Improvements inDrums; and I do hereby declare the following to he a full, clear, andexact description of the invention, such will enable others skilled inthe art to which it appertains to make and use the same, reference beinghad to the accompanying drawings, and to letters of reference markedthereon, which form a part of this specification.

The present invention relates to improvements in drums; and itconsistsin the particular arrangement of the snares. Owing to thisarrangement, the tightening and loosening of the snares in theirlongitudinal direction, as well as the raising of the snares from bothdrumheads, can be actuated from the outside, whereby possibility isafforded to render at will the tone of the drum more or less clear or tomuflie the drum; For this purpose the two drum snares stretched overguide-shanks are connected,on the one hand,

with a tension device, enabling the tighten ing of the same in theirlongitudinal direction, and, on the other hand, with a spring serving toequalize the tension. In their middle part the snares are connected bymeans of tension devices with a slider, which when moved outward drawsthe two snares toward each other, and thus moves either of them awayfrom each drumhead.

The accompanying drawing. represents a vertical section of a drumprovided with the above-mentioned improvements.

a-is the upper drumhead; a, the lower drumhead. Both drumheads can betightened in the known manner by means of the tensionhoops Z) Z? and thescrews 11*. The drumsnares c are arranged in the interior of the drumand are stretched diametrically near the drumheads over the horizontalguidingshanks c, fastened to the drum-cylinder d.

Between the upper andthe lower drumsnares o a spiral spring cl isarranged on the one side, while on the opposite side the tension deviceis arranged. This tension device consists in a prisnrshaped rod f,provided on its two opposite surfaces with screw-threads and guided in asocket f in such a manner that the rod can move in the direction of itslength, butis prevented from turning around its axis. This rod isprovided on one of its extremities with a hook f, to which the upperdrum snares are secured, and passes through a screw-nut f arrangedbetween the arms of a strap f fixed to the drum-casing (1, whereby allaxial motion of the nutf is prevented. The milled edge of the screwnut fpasses through a slot of the drum-casing d to the outside, and can thusbe easily rotated.

The lower drum-snares c are connected at one extremity with'the spiralspring d',which equalizes the tensiomand at their other eX- tremity witha'fiXed eye f If the screW-nutf is rotated from the out side, the rodfis moved lengthwise in the socketf, the drum-snares being thus tightenedor loosened.

Between the two drumheads a horizontal tube 9 is affixed to thedrum-cylinder d, in which tube a socket h, provided with female threads,can move lengthwise, but without being able to turn. This socket 7L isadjusted by means of a screw-threaded spindle e, accessible from theoutside, arranged within a flange of the drum-cylinder and engaging thefemale threads of the socket h. The interior end of the socket h isconnected with the middle part of the snares by means of wires or cordsj.

r In the normal position the snares c are in contact with the drumheads,which divide each of the drumheads in two vibrating halves. If it isintended to change the tone of the drum, the screw-spindle 'i is turnedin such a manner as to move the socket h away from the center of thedrum. As can be seen from the drawing, this displacement of the socket hhas for effect to move the snares away from the drumheads, which can nowthe cylinder, means for resiliently connecting said snares, and meansfor regulating the tension thereof, substantially as set forth.

2. In a drum, the combination with the cylinder and heads, of snaresmounted within the cylinder, means for supporting the snares in contactwith the heads, means for resiliently connecting said snares, means forregulating the tension thereof, and means for withdrawing the snaresfrom contact with the heads, for the purpose specified.

3. In a drum, the combination with the cylinder and heads, of snaresmounted. within the cylinder, means for supporting the snares in contactwith said heads, a tension device connecting said snares, a spring toequalize the tension, means for regulating the tension exteriorly of thedrum, mechanism for withdrawing the snares from contact with the heads,and means for operating said mechanism from the exterior, substantiallyas de scribed.

4. In a snare-drum, the combination with the cylinder and heads, 013shanks mounted within the cylinder, snares supportedon said shanks, aspring connecting the snares at one end and a tension device connectingthem at the other end, whereby said snares are caused to contact withthe heads, and mechanism for withdrawing the snares from contact andmeans for operating said mechanism from the exterior of the cylinder,for the purpose specified.

'In testimony that I claim the foregoing as my invention I have signedmy name in presence of two subscribing witnesses.

JOHANN HENNL.

Witnesses:

FRANZ YUNGER, ADOLPH FISCHER.

